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Low-latency voice AI platform built around the Sonic text-to-speech model.
Centers on Sonic, a text-to-speech model built on state space model (SSM) architecture for ultra-low latency, alongside the Ink speech-to-text model and the Line voice agents platform. Also offers voice cloning, voice conversion, and dubbing. Supports cloud, on-premise (VPC or self-hosted), and on-device deployment, with a free tier plus usage-based credits and per-minute agent billing.
Strengths
- Ultra-low latency text-to-speech optimized for realtime interaction
- State space model architecture aimed at efficiency at scale
- Cloud, on-premise, and on-device deployment options
- Voice cloning and conversion capabilities
Tradeoffs
- Proprietary models limit portability compared with open-weight options
- Usage-based agent minutes add cost on top of base credits
- Newer ecosystem than longer-established voice vendors